Expensive way to change one's profile? (8,7)
I believe the answer is:
cosmetic surgery
'expensive way' is the definition.
The answer and definition can be both related to thinking as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'change one's profile?' is the wordplay.
I cannot quite see how this works, but
'change' could be 'surge' (surge is a kind of change) and 'surge' is found within the answer.
'one's' could be 'os' (I've seen this in other clues) and 'os' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
'to' is the link.
Can you help me to learn more?
(Another definition for cosmetic surgery that I've seen is " it could be nip and tuck!".)